public class Demo {
	public static void main(String[] args) {
		Person person = new Person ( ) ;
		person.bike = new Bike ( ) ;
		person.computer = new Computer ( );
		person.name = "小明" ;
		person.age = 21;
		person.sex = "男";

		person.goToSchool ( ) ;
		person.doTest( );
		
	}
}